Over the past eighteen years I have acted as a scientific consultant to the U. S. Air Force on the subject of unidentified flying objects - UFO's. As a consequence of my work on the voluminous air force files and, to a greater extent, of personal investigation of many puzzling cases and interviews with witnesses of good repute, I have long been aware that the subject of UFO's could not be dismissed as mere nonsense.
The fact that television and tourism have made the whole world accessible has created the illusion that we enjoy intimate knowledge of other places, when we barely scratch their surface. For the vast majority, the knowledge of Thailand or Sri Lanka acquired through tourism consists of little more than the whereabouts of the beach.